Pressure sensor and device comprising the same
First Claim
1. A pressure sensor comprising:
- an inlet for connecting to a body of gas;
a diaphragm assembly comprising;
a first diaphragm and a second diaphragm, the first and second diaphragms defining a chamber therebetween, the chamber being connected to the inlet;
a first transducer responsive to movement of the first diaphragm and operable to produce a first electrical signal in response to the same; and
a second transducer responsive to movement of the second diaphragm and operable to produce a second electrical signal in response to the same; and
an amplifier disposed in the chamber of the diaphragm assembly and connected to the first and second transducers to receive the first and second electrical signals therefrom.
1 Assignment
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Accused Products
Abstract
A pressure sensor is provided, the sensor comprising an inlet for connecting to a body of gas; a diaphragm assembly comprising a first diaphragm and a second diaphragm, the first and second diaphragms defining a chamber therebetween, the chamber being connected to the inlet; a first transducer responsive to movement of the first diaphragm and operable to produce a first electrical signal in response to the same; and a second transducer responsive to movement of the second diaphragm and operable to produce a second electrical signal in response to the same; and an amplifier disposed in the chamber of the diaphragm assembly and connected to the first and second transducers to receive the first and second electrical signals therefrom. A movement sensor assembly for detecting movement of a person is also provided, the assembly comprising a flexible vessel containing a body of gas and a pressure sensor according to any preceding claim, the sensor being arranged to detect changes in the pressure of the gas within the flexible vessel.
9 Citations
16 Claims
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1. A pressure sensor comprising:
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an inlet for connecting to a body of gas; a diaphragm assembly comprising; a first diaphragm and a second diaphragm, the first and second diaphragms defining a chamber therebetween, the chamber being connected to the inlet; a first transducer responsive to movement of the first diaphragm and operable to produce a first electrical signal in response to the same; and a second transducer responsive to movement of the second diaphragm and operable to produce a second electrical signal in response to the same; and an amplifier disposed in the chamber of the diaphragm assembly and connected to the first and second transducers to receive the first and second electrical signals therefrom. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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Specification